The Speed of Dark is a work of profound and wonderful science fiction. Like the best of its genre, it plays with the possible in order to question the actual. Elizabeth Moon paints a near-future world where Autism can be corrected before birth. The book follows a group of the last generation of autists (the ones born before the cure existed) and one of them, Lou Arrendale, in particular. You can read the plot summaries and other reviews over at Amazon so I won't do that here. I will say that Moon does a marvelous job raising issues of identity, disability, and personal growth. Even better, she doesn't try to answer them. That's up to each of us.